function fillComune(){ 
 // this function is used to fill the Comune list on load
addOption(document.drop_list.Comune, "Rimini", "Rimini", "");
addOption(document.drop_list.Comune, "Bellaria", "Bellaria", "");
}

function Selectf(){
// ON selection of Comune this function will work

removeAllOptions(document.drop_list.f);
addOption(document.drop_list.f, "", "Tutte");

if(document.drop_list.Comune.value == 'RIMINI'){
addOption(document.drop_list.f,"Bellariva", "Bellariva");
addOption(document.drop_list.f,"Marebello", "Marebello");
addOption(document.drop_list.f,"Marina Centro", "Marina Centro");
addOption(document.drop_list.f,"Miramare", "Miramare");
addOption(document.drop_list.f,"Rivabella", "Rivabella");
addOption(document.drop_list.f,"Rivazzurra", "Rivazzurra");
addOption(document.drop_list.f,"San Giuliano", "San Giuliano");
addOption(document.drop_list.f,"Torre Pedrera", "Torre Pedrera");
addOption(document.drop_list.f,"Viserba", "Viserba");
addOption(document.drop_list.f,"Viserbella", "Viserbella");
}


if(document.drop_list.Comune.value == 'BELLARIA'){
addOption(document.drop_list.f,"Igea Marina", "Igea Marina");
addOption(document.drop_list.f,"Bellaria", "Bellaria");
}

}
////////////////// 

function removeAllOptions(selectbox)
{
	var i;
	for(i=selectbox.options.length-1;i>=0;i--)
	{
		//selectbox.options.remove(i);
		selectbox.remove(i);
	}
}


function addOption(selectbox, value, text )
{
	var optn = document.createElement("OPTION");
	optn.text = text;
	optn.value = value;

	selectbox.options.add(optn);
}